I have set up an on-premises data gateway on a server in our company. A datasource has been added in the gateway settings in Power BI with the information required to connect to our SQL database. The data refresh in Power BI works perfectly for reports where the SQL server is the only source, or where a OneDrive file is the only source. However, as soon as I link to a OneDrive Excel spreadsheet and SQL server in the same dataset, the refresh no longer works. When I look at the settings for the dataset, I am told I need to install a personal gateway and I can no longer select the gateway I have already set up. Adding the link to the file in the gateway settings doesn't help either. If these two sources work fine independently, why don't they work in the same dataset?